SEED TOP-POPPER: Garden Activity for Young Children

One of my first illustration assignments was for a book about gardening activities with children.  At that time, most books for children were illustrated with black and white art so I made pencil drawings.  Here is one of the activities meant for younger children.  It would work well with pre-school or kindergarten children.
SEED TOP-POPPER
Have the children fill a plastic bottle or plastic film canister with pea or bean seeds.  Fill with water and put on the top.  The seeds will swell, and by the following day the pressure created will pop the top off the container.
Materials needed: Plastic bottle or film canister, pea or bean seeds.
From Children’s Gardens: A Field Guide for Teachers, Parents and Volunteers by Elizabeth Bremner and John Pusey, Illustrations by Caroline Arnold